d block elements

Atomic number of Iron(Fe) is

• 28

• 26

• 21

• 25

d-block elements are known as transition elements because

• they transit metallic properties of s-block into non-metallic properties of p block

• last electron of these elements occupy d-orbital

• all of these are metals

• all of these elements are coloured

First transition series is called as ….

• 4d series

• 3d series

• 5d series

• None of these

electronic configuration of zinc is ....

• ₁₈ [Ar] 4s² 3d¹⁰

• ₁₈ [Ar] 4s² 3d⁹

• ₁₈ [Ar] 4s¹ 3d¹⁰

• None of these

Nb and Ta shows similar properties due to similar atomic radius.

• True

• False

• Maybe

• I don't know